A self-propelled forage harvester is disclosed that includes a blade sharpening and shear bar adjusting device, a monitoring device configured to cyclically generate information on the state of the cutterhead chopping glades and the distance of the shear bar to the cutting edge, and a control unit. The control unit evaluates the information provided by the monitoring device about the state of wear of the chopping blades and the distance, compares it with a limit value for the state of wear and/or the distance, where the limit value forms a lower limit for an optimum range to be maintained by the blade sharpening and shear bar adjusting device, of the instantaneous cutting sharpness of the chopping blades or of the distance and, when the limit value is reached, automatically triggers a sharpening process and/or of a shear bar adjustment by the blade sharpening and shear bar adjusting device.

A self-propelled forage harvester is disclosed that includes a blade sharpening and shear bar adjusting device, a monitoring device configured to cyclically generate information on the state of the cutterhead chopping glades and the distance of the shear bar to the cutting edge, and a control unit. The control unit evaluates the information provided by the monitoring device about the state of wear of the chopping blades and the distance, compares it with a limit value for the state of wear and/or the distance, where the limit value forms a lower limit for an optimum range to be maintained by the blade sharpening and shear bar adjusting device, of the instantaneous cutting sharpness of the chopping blades or of the distance and, when the limit value is reached, automatically triggers a sharpening process and/or of a shear bar adjustment by the blade sharpening and shear bar adjusting device.

A detection arrangement for detecting a wear status of a chopping knife arrangement of a chopping device provided for processing a product flow, wherein the chopping device has a revolving chopping drum receiving the chopping knife arrangement and at least one shear bar which cooperates with the chopping knives, with a sensor arrangement which has a magnetic exciter arrangement and a flux conducting device magnetically coupled thereto. The sensor arrangement provides a pole arrangement which forms at least one magnetic pole with a pole surface for conducting magnetic flux, wherein at least a portion of the chopping knife passes the pole arrangement during a rotation of the chopping drum. A voltage induced when a chopping knife arrangement passes the sensor arrangement forms the measured magnetic value, which is used by the evaluation unit to determine the state of wear of the chopping knife arrangement.

A detection arrangement for detecting a wear status of a chopping knife arrangement of a chopping device provided for processing a product flow, wherein the chopping device has a revolving chopping drum receiving the chopping knife arrangement and at least one shear bar which cooperates with the chopping knives, with a sensor arrangement which has a magnetic exciter arrangement and a flux conducting device magnetically coupled thereto. The sensor arrangement provides a pole arrangement which forms at least one magnetic pole with a pole surface for conducting magnetic flux, wherein at least a portion of the chopping knife passes the pole arrangement during a rotation of the chopping drum. A voltage induced when a chopping knife arrangement passes the sensor arrangement forms the measured magnetic value, which is used by the evaluation unit to determine the state of wear of the chopping knife arrangement.

Dynamic regulation of contact pressures in a blade sharpening system is provided. An example multiphase grinding wheel has a grinding face with one or more abrasive concentric rings for sharpening the cutting blade of the log saw machine, and one or more padded concentric rings consisting of fiber padding. Sharpening with the multiphase grinding wheel improves cut quality, increases blade life, removes glues and varnishes from the cutting blade, reduces blade deformation, and hones the edge of the cutting blade. A pneumatic tensioning system uses air bladders to apply dynamic cushioning and processor-controlled contact pressure between the grinding wheels and the cutting blade during sharpening. The fiber-padded grinding wheels and the air bladder tensioner provide improved sharpness of the cutting blade and longer life for the mechanical components.

Dynamic regulation of contact pressures in a blade sharpening system is provided. An example multiphase grinding wheel has a grinding face with one or more abrasive concentric rings for sharpening the cutting blade of the log saw machine, and one or more padded concentric rings consisting of fiber padding. Sharpening with the multiphase grinding wheel improves cut quality, increases blade life, removes glues and varnishes from the cutting blade, reduces blade deformation, and hones the edge of the cutting blade. A pneumatic tensioning system uses air bladders to apply dynamic cushioning and processor-controlled contact pressure between the grinding wheels and the cutting blade during sharpening. The fiber-padded grinding wheels and the air bladder tensioner provide improved sharpness of the cutting blade and longer life for the mechanical components.

The sharpening system for cutter blades for cutting flexible materials in automatic cutting machines comprises at least one sharpening element, and it also comprises a first sharpening module that includes at least one first sharpening element, and a second sharpening module that includes at least one second sharpening element. It provides a sharpening system that offers an integral and simple solution to current sharpening systems by incorporating an active sharpening system in the guide plate, either in the rotary area or on the outside, or symmetrically in the upper part of the lower body of the cutting head, interchangeably.

A whetting device for a slicer has a whetstone for sharpening a circular blade of the slicer; a hone for deburring the blade; a handle for moving the whetstone or hone toward the blade; a mount fastenable to a stop plate of the slicer, having an insertion apparatus for form-fittingly insertion into the stop plate, a U-shaped plate receptacle which has a gap for introducing the stop plate into the gap when the whetting device is pushed onto the stop plate; a receptacle for engaging around an end of the blade guard ring when the stop plate is a predetermined distance from the circular in the direction of rotation of the blade, and not to engage when shorter than that distance between; and a frame covering a cutting edge of the circular blade and for pivoting the whetting device into a working position.

A whetting device for a slicer has a whetstone for sharpening a circular blade of the slicer; a hone for deburring the blade; a handle for moving the whetstone or hone toward the blade; a mount fastenable to a stop plate of the slicer, having an insertion apparatus for form-fittingly insertion into the stop plate, a U-shaped plate receptacle which has a gap for introducing the stop plate into the gap when the whetting device is pushed onto the stop plate; a receptacle for engaging around an end of the blade guard ring when the stop plate is a predetermined distance from the circular in the direction of rotation of the blade, and not to engage when shorter than that distance between; and a frame covering a cutting edge of the circular blade and for pivoting the whetting device into a working position.

A whetting device is for a slicer. The whetting device has: a whetstone that sharpens a circular blade of the slicer; a hone that deburrs the circular blade; a handle that moves the whetstone or the hone toward the circular blade; and a mount for fastening to a stop plate of the slicer. The mount has an insertion apparatus for being form-fittingly inserted into the stop plate. The mount having a U-shaped plate receptacle, which has a gap for introducing the stop plate into the gap in when the whetting device is pushed onto the stop plate. The insertion apparatus has a lug for engaging in an recess in the stop plate, or the stop plate has the lug for engaging in the recess in the insertion apparatus.